module RSpec
  module Core
    RSpec.describe DidYouMean do
      describe '#call' do
        context "when `DidYouMean::SpellChecker` is available", :skip => !defined?(::DidYouMean::SpellChecker) do
          context 'Success' do
            let(:name) { './spec/rspec/core/did_you_mean_spec.rb' }
            it 'returns a useful suggestion' do
              expect(DidYouMean.new(name[0..-2]).call).to include name
            end
            context 'numerous possibilities' do
              it 'returns a small number of suggestions' do
                name = './spec/rspec/core/drb_spec.r'
                suggestions = DidYouMean.new(name).call
                expect(suggestions.split("\n").size).to eq 4
              end
            end
          end
          context 'No suitable suggestions' do
            it 'returns empty string' do
              name = './' + ('x' * 50)
              expect(DidYouMean.new(name).call).to eq ''
            end
          end
        end
        context "when `DidYouMean::SpellChecker` is not available", :skip => defined?(::DidYouMean::SpellChecker) do
          describe 'Success' do
            let(:name) { './spec/rspec/core/did_you_mean_spec.rb' }
            it 'returns a hint' do
              expect(DidYouMean.new(name[0..-2]).call).to include 'Hint:'
            end
          end
        end
      end
    end
  end
end
